Harrow



. Patented Mar. 14, I899. A. F. MULITUR.

H A R R 0 W.

(Application med on. 20, 1898.1

(No Madel.)

co., PHOTD-LITHQ. wumno'rou IINTTED STATES AARON FREDERIO MOLITOR, OF LANSING, MICHIGAN.

HARROWL SPECIFICATION forming part of Letters Patent No. 621,309, dated March 14, 1899.

Application filed October 20, 1896- To all whom, it may concern:

Be it known that I, AARON FREDERIO MOLI- TOR, a citizen of the United States, residing at Lansing, in the county of Ingham and State of Michigan, have invented certain new and useful Improvements in Harrows,of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to the construction of harrows, and is embodied in the constructive arrangement and combination of parts hereinafter described, and particularly set forth in the claim.'

In the drawings, Figure 1 is a plan view of a section of a spring-tooth harrow embodying my invention. 2 is a central vertical section of Fig. 1. 'Fig. 3 is a perspective View showing the construction of one of the trailingrunners. Fig.4isaverticalsectionthereof through the end of one of the bars; and Fig. 5 is a perspective View of one end thereof, showing the securing-collar detached from the frame.

A is the frame, which may be of any suitable construction.

B are the tooth-bars. These tooth-bars I preferably make hollow, and they are preferably formed by simply cutting off wroughtiron or steel pipe to the desired length. The tooth seat-blocks O are attached thereto by casting them thereon or otherwise casting them integral therewith. This may be done by placing the bars in the sand as cores and pouring the metal around'them, so that the seat-blocks will be cast upon and around the bars, as plainly shown in Figs. 4 and 5. These seat-blocks have on their under faces seats D for the spring-teeth E, and the sides of these seats are preferably provided with flanges F to prevent side motion of the tooth. Apertures are formed through the seat-blocks and bars to receive the clamping-bolts G, which always engage through the clip-plate H, which inturn binds the tooth upon the seat.

The bars 13 are supported on the frame to have a rocking motion for adjusting the teeth up or down. This support and the means for rocking the bars I have shown as follows:

I is a collar having the ears J secured to the side of the frame, and in this collar the ends of the tooth-bars are supported, being kept from accidental displacement or withdrawal by means of the pins K, the ends of which may move in an annular recess L in the col- Serial No. 609,387. (No model.)

lar. (Shown in Fig. 4:.) To each bar is clamped or otherwise secured the rock-arm M, the rockarms of the various bars being connected by a connecting-bar O, which at its end is pro- Vided with a notched segment P and is connected to a lever B, having a spring-latch adapted to engage it with the teeth of the segment.

The construction thus far described enables me to form such a harrow with tooth-bars which are very light and exceedingly strong and to dispense with all bolts or other securing devices heretofore used for clamping or holding the tooth seat-blocks upon the bars, which holding devices not only involve expense and labor to apply them, butare constantly getting out of order or getting lost. Thus my improvement lessens the expense -of manufacture, greatly simplifies the construction, and improves the harrow by greatly lessening the chances of accident or the necessity of repair.

The shoes in harrows have heretofore been runnersthat is, runners which have a sWiv-' eled or pivotal connection with the frame, which are free to turn with the angular movements of the harrow or because of side strains or thrusts on the runners.

The construction which Ipreferably employ is that shown in the drawings,and consists of a runner formed of a single plate S, bent upwardly at its forward end and provided at its upper end with a pin T, which engages in a bearing or bearings U on the frame. From what has been said the advantages of this runner will be obvious, greatly lessening the draft and preventing the frame from sinking into loose ground, the.

WVhat I claim as my invention is- The combination with the side bars, of the rocking bars 13, extending between side bars, collars I having the recess L secured to the side bars and in which the ends of the rockbars are engaged, and a pin K through the bars engaged in a recess L in the collars, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses. I

AARON FREDERIO MOLITOR.

Witnesses:

JAMES WHITTEMORE, OTTO F. BARTHEL. 

